Перегляд Періодичні видання НТУ "Дніпровська політехніка" по назві
Зараз показуються 271-290 з 3493
-
Numerical simulation of an external ballistic problem using analytical approach and atmosphere flow visualization by finite element method
(2023)Purpose. Analysis of the dynamic characteristics of the cargo in the presence of the speed of its carrier, taking into account the influence of the external environment and the determination of factors that affect the ... -
Numerical simulation of polluted air suction near the road
(2018)Development of 2D numerical model, which allows quick computation of polluted air suction near the road. The purpose of the work is development of the fast calculating CFD model which takes into account the meteorological ... -
On the identification of Ti-Ta-Nb-oxides in “wiikites” from Karelia
(National Mining University, 2018-03-30)Purpose. With respect to the nature of Ti-Ta-Nb-oxides, which are included in the mineral associations that have historically gone by the now outdated name of “wiikites”, there is no unanimity of opinion. The main difficulty ... -
On the issue concerning improvement of a mud preparation technology at the expense of hydrodynamic cavitation
(Видавництво НТУ "ДП", 2022)Purpose is to improve the technology of drilling mud by applying hydrodynamic cavitation. Research methodology is represented by the theoretical and experimental studies of hydrodynamic cavitation, performed with the help ... -
On the methodology for considering scale effect of rock strength
(National Mining University, 2020-12-30)Purpose is to improve a methodology for considering the influence of scale effect by transferring to the evaluation of rock strength immediately within the rock mass. Methods. The research involves methods of critical ... -
On the possibilities to apply indices of industrial coal-rank classification to determine hazardous characteristics of workable beds
(Dnipro University of Technology, 2021-06-30)Purpose is to identify behaviour of the graded indices as well as their correspondence to grades, groups, and subgroups of similar coal metamorphic degrees to determine hazardous characteristics of workable beds while ... -
Openwork scheduling for steep-grade iron-ore deposits with the help of near-vertical layers
(Dnipro University of Technology, 2021-03-31)Purpose is to develop efficient scheduling to excavate steep-grade iron-ore deposits using near-vertical layers relying upon production practices by an open pit of Poltava Mining-and-Processing Integrated Works (MPIW). Methods. ... -
Operational lifetime increase of the pumping equipment when pumping-out contaminated groundwater
(Dnipro University of Technology, 2021-03-31)Purpose. Solving the problem of increasing the pumping equipment operational lifetime when pumping-out contaminated groundwater in the iron-ore industry by extracting the hard, abrasive part, using magnetic filters based ... -
Opportunities and threats related to labour market globalization
(Економічний вісник Національного гірничого університету, 2009-06-01)The article considers different aspects of globalization and its consequences for national labour markets. The main forces of globalization process are analyzed. The main factors of the process are explored. The author ... -
Optimalspeed controller with predetermined difficulty
(НГУ, 2013)Today the engineering industry share of Ukraine is 12%, although in the early 90's it stood at 31% and was the basic industry of the country [1]. Dnipropetrovsk region engineering complex consists of 120 plants, which ... -
Optimization of blasting works during the destruction of masses with complex structure
(National Mining University, 2017-09-30)Purpose. To study the quality of crushing rocks with different strength properties, depending on parameters of the charges location and the blasting time. Methods. Based on the destruction of laboratory samples, histograms ... -
Optimization of blending operation for Aswan phosphate mines using linear programming
(National Mining University, 2018-12-30)Purpose. The economic value of phosphate is reduced when randomly blending raw phosphate produced from different mines. Therefore, the blending process of different raw phosphate ores to produce economic percentage of P2O5 ... -
Optimization of contact stresses in shoe brakes of mine hoisting machines
(2024)Originality. The proposed analytical model is based on the Winkler elastic foundation involving variable stiffness parameters, which provides high accuracy in modeling the actual physical characteristics of the braking ... -
Optimization of molybdenite flotation using response surface method
(National Mining University, 2018-03-30)Purpose. The paper is aimed to study the molybdenite flotation from a low-grade uranium ore containing 0.2% of Mo. Methods. Three control parameters including frother (MIBC) dosage, collector (gasoline) dosage and pH, ... -
Optimization of position of the cyclical-and-continuous method complexes when cleaning-up the deep iron ore quarries
(National Mining University, 2019-09-30)Purpose. An algorithm development for calculating the optimum depth for cyclical-and-continuous method schemes introduction when cleaning-up the deep iron ore quarries. Methods. When developing an algorithm for calculating ... -
Optimization of product processing modes in modeling and programming of machining on machine tools with program control
(2023)Numerical research results have been obtained for a scientifically based approach to solving the technical problem of high-performance turning of cast iron parts on multi-axis machining centers, which contains a set of ... -
Optimization of salt crystallization process by solar energy with the use of mirror reflection, case of Chott Merouane El-Oued (South East of Algeria)
(National Mining University, 2018-09-30)Purpose. This paper aims to improve the harvesting conditions of the crystallized salt layer of the Salins Merouane El Meghaier (SME) – South East of Algeria, by creating favorable conditions for means of harvesting ... -
Optimization study of blasting operations in Roşia Poieni open pit mine, Romania
(Dnipro University of Technology, 2021-12-30)Purpose. Drilling-blasting technology is one of the simplest and most often used techniques in open pit mining. This allows the excavation of a large volume of rock and useful mineral substance. The operation of blasting ... -
Optimizing the separation characteristics of the waterinjection hydrocyclone using mathematical modelling
(Dnipro University of Technology, 2021-12-30)Purpose. Although the hydrocyclone separator has many advantages, it still has some limitations which decrease its separation efficiency in many mineral processing applications because of fine particles which are miss ...